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A technique for discretizing efficiently the solution of a Linear descriptor (regular) differential input system with consistent initial conditions, and Time-Invariant coefficients (LTI) is introduced and fully discussed. Additionally, an upper bound for the error ‖x¯(kT)−x¯k‖ that derives from the procedure of discretization is also provided. Practically speaking, we are interested in such kind of systems, since they are inherent in many physical, economical and engineering phenomena.

Laparoscopic stapled splenic cyst excision can be performed safely and is particularly effective for large superficial non-parasitic cysts. This technique allows spleen preservation with a low cyst recurrence rate. However, it may not be suitable for deeper intraparenchymal splenic cysts. Further studies are required to refine the management of specific subtypes of non-parasitic splenic cysts.